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RS-232 Serial Control BenQ Projector

Hi,

I try to Power ON and OFF a BenQ W6500 Projector via Serial Command.

I use a straight RS-232 cable and sending an EOL String from a BrighSign player. 

The ASCII commands are:  <CR>*pow=on#<CR> and <CR>*pow=off#<CR>

I've tried sending the string with and without the <CR> digits.

The settings in the Interactive tab of the Presentation Properties seem to be right.

Thanks for helping.

13 comments

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    Lyndon

    in brightauthro you wouldn't add CR to the command field. If you choose the send serial command that includes eol, then it's automatically added. If you add the CR to the string, then it'll fail. 

     

    can you attach a screenshot of what the command looks like. 

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    Joe Bless

    I've tried both with and without <CR>

     

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    Lance Lander

    I did a Google search and it looks like you may need a cross over cable (pins 2&3 reversed).  You only need pins 2,3,&5.  I make my own cables using terminal connectors (link below).

    Also, make sure you have the correct baud rate selected for the projector (File-Presentation Properties-Interactive tab-Baud Rate).  

     

    http://www.amazon.com/DB9-M3-Female-Adapter-3-Position-Terminal/dp/B00WW6XT4O/ref=sr_1_9?ie=UTF8&qid=1459279751&sr=8-9&keywords=RS-232+terminal

     

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    Lyndon

    can you attach a link to the documentation for the serial commands, or post a picture of the page that shows this sample command you're trying to send?

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    Joe Bless

    I've tried both a crossed and a straight cable. I also checked the baud rate.

    this is where i got the commands from: ftp://downloads.benq.net/projector/manuals/RS_Commands_Generic_082613.pdf

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    Lyndon

    where you do see a reference to a carriage return? I must be missing it in the pdf. IN brightauthor, under presentation properties, you have port speed 115200 selected? 

     

    Also, when you publish, make sure serial debug is disabled or the commands won't likely work.  

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    Lance Lander

    In the .PDF under "wire assignments" you can see that pins 2 & 3 are reversed. So, it is a crossover cable. And the default baud rate is 115200. But check the baud rate of the projector and make sure the BrightSign player and the projector have matching baud rates.

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    Joe Bless

    I've used 115200 baud rate also on the projector.

    Is serial debugging "on" by default? If yes, how to set it to "off" ?

    Edit: "Enable serial debugging" was unchecked so it should be off

    Thanks

     

  • 0
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    Lyndon

    No, it's not on by default, but on the publish tab, there's a check box, two actually, one for serial debugging, and one for system debugging. 

     

    I still don't see anything in the pdf about CR when sending commands. is that in another document?

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    Joe Bless

    Serial debugging was off.

    The <CR> was from an other BenQ Manual but i've tried both with and without <CR>.

    This was the other Manual: ftp://ftp.benq.de/projector/new%20folder/rs232_code_mp623_mp624.pdf

    Thanks

  • 0
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    Joe Bless

    I've checked the cable which i thought was crossed but it looks like it's also a straight cable.

    I will buy a crossed cable tomorrow and give feedback. This should do the trick.

    Thanks for helping guys.

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    Brandon Kelm

    I would suggest using a local terminal on your PC (PuTTy, TeraTerm, I think Hercules does serial as well) and firing off the commands from there until you find the right combination of commands and/or hardware.

    Once you get that working to be a known good string, then move it over to the BrightSign.  

    I ended up going that route to start using UDP messages to control a BrightSign player.  I had a lot of issues off of the bat, not knowing if I was sending the wrong string, if my PLC wasn't outputting the correct string, etc.  It was a lot easier to fire commands from a local client, then move it over to my PLC and start troubleshooting the output from there.

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    krt

    The same situation with benq 820

    Baud rate the same - 115200, serial debug is OFF

    Tried with straight and inverted signals - nothing happened

    Using xt1143 and brightsign serial cable SER9D35

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